Truck-bolster.



PATENTBD APR.17, 1906.

2 SHEETS-SHEET 1.

.0. A. LINDSTRM.

TRUCK BoLsTER.

APPLICATION FILED DBU. 8. 1905.

WITHESSES No. 817,789. PATENTED APR. 17, 1906. G. A. LINDSTRM.

TRUCK BOLST'ER.

APPLIOATION FILED Dnc. s, 1905.

z SHEETS-SHEET 2.

- the car.

only e beam suppz'- the ends and loa-fA 'will be seen that the CHARLESA. tisnsrnon, or

. Penseel) einen on Conronii'rros NEW JllltS To all whom, 1,1: muyconcer/rt:

Be it known that l, Uneniins L lnxn- 3 STR'Q'M, oflllegheny, Alleghenyoountyglenn- Sylvania, have invented n new and useful i Truck-Bolster,of which the following is a l full, clearJ and exart description,reference l being had to the aoeom anying,r drawings, l arming part ofthis speci cation in whic'hl igure 1 is a plan view of a truck-bolsterembodying my inven ti an.

llo. .2152 UIP (1l h the flllle altli/ lll inde elevetion and nsrtlv lin vertice section. Fig. a rvs -sertion on the line lll lli olA i, and lis en ,l

end view.

My invention relates to the built-up type, and is designed o provide animproved construction of tl i 'i member of the bolster i-.vlierein tileis distributed in accordance ie stresses which come u on such member.The eompressionrneni )er oi? truel--bolster is not teil (n theswing-seats et ,l the renter `over the centerplate, but it is else abeani supported at the' two ends by the troon-Columns and loaded at thecenter at its ed es, the latter lead being due to and reeeived pon thestopping of the car. Thee conditions require that the bolster should bestrongest at 'the center, not only vertically, but also transversely, orin the direction er' the length oi" This object l attain by the Aeouliar construction of the compression mem er now to be described.

ln the dravvings, 2 sion member of a bols from a flat sheet of steelconipressedsinto the shape of a channel liev'ng denending iianges 3 andso formed that et 'the middle portion g ll signetes the compres t Wlneli1s :formed thelienges are relatively shallow and the web portionrelatively wide, while at the end portions the flanges are deeper andthe web nerrower. Thus by referenoe to the drawings it web portion towiden at each end where the side bearing-s and gradually increases ineonmienees at about the point re seeured thereto Width to the center,with a corresponding deereese in the l depth of the iinnges 3, l

5 designates the usual plato tension mem-' ber, whose end portions areriveted to the up- Wardlyfbent' portions of the compression member. 4 l7 isl the center-plate support or strut 5 S,the l @pacification ofLetters Patent.

:Patented April 17, i996.

ipplicetion le' December ,8, 1905. Serial ilo. 290.883.

center plate or bearing; Sl, the usunl'attarl'iment for 'the (lend-levergnifleanclior ol' the broke-rigging, and l() the eltechment for thelive-lever guide ol suoli rigging.

l1 1l are the usual end castings, and 12 represents the side-bearingsupports or braces.

rlhe advantages of my invention result from the Construction rl" thecompression nie'nber of the bolster from pressed steel in such a mannerthat this memberhns its greet-- est strength transversely et its centralportion :ind greatest depth Q'ertiraily its ends, with its end iortionsbent upwardly to receive the ten. :n member. This last-neined feature,es will beseen, ail'ords a secure oonneetion between the compression andtension members and osueli character as to be par ticulnrly adapted t)receive the thrust and strains to which these ports are subjected. Si)ling as these features of my invention are ,stained various rlninges mevbe mede in the details oi construction en( arrangement without departingfrom the spirit end scope of roy invention. further advantage of mymethod of constructing the Compression y end lianges, togetner with the.upwardlyhent end portitns, een all be obtained by one operation, thusgiving advantages of construction es well as of strength, Whereas whenthe Compression members are rolled the distribution ot material in thisLs nanner cannot be obtained and seperate operations are necessary toform the dill'orent ports of the tornu pression member.

lvhat l claim is l. ln e truuk-bolster, a pressed-steel Conim pressionmember of channel forni, having at its central izrtion a relatively wideweb and relatively slizillfiw flanges, Lind et its end portions dee )orflanges and a narrower Web portion said end portions beingbent'upwrirdly to receive e tension member substantially as doseribod.

increasingr width i'r center, vand l'lange portions ol depressing IOOdepth from the ends 'Lmnud the, center the and portions of the. webboing beutupwmrdly; substantially as dcscl'ibcd.

4.1. In a truck-holster, a pressed-stesi compressiuii member o" chamieform, fumed ifrom a single pluie u sheet and having uit its @entraipoxtinn a i'elaitivey wide web and relativcy shzilmw Hangcs, und at itsGnd poi'- iims a lativeiy narrow web and deeper anges said and )ortionsbein 'bent upwardly substantiaily as described.

5. A. Huck-bolster having ay pressed-steel s was@ compression member 0fchannel foim, Wider at its center than at its ands, and having its Hangsportions of insreasing depth toward l die ends which are benty upwarly,sind a new sion member connected thereto; substantialy as described. iIn testimony whereof I have hereunto set t' my hand.

CHARLES A. LNBSTR. l Nimessesz K. L. ROBINSON, B. FISHER.

